A pot's one unusual kitchen item (8)
I believe the answer is:
teaspoon
'kitchen item' is the definition.
'a pot's one unusual' is the wordplay.
'unusual' indicates anagramming the letters.
'a'+'pots'+'one'='apotsone'
'apotsone' with letters rearranged gives 'TEASPOON'.
(Other definitions for teaspoon that I've seen before include "Small piece of cutlery" , "Small stirrer" , "Cooking unit" , "Kitchen utensil able to hold about one fluid dram" , "Not Aesop (anag.)" .)